If there is no specific virus than there is no grounds to say that a virus could reanimate a corpse.

"thousands of scratch marks adorned every surface of the tomb, as if the corpse had tried to claw its way out!" That doesn't mean the body was reanimated. The person may not have been dead and tried to get out. In 1892, they don't have the science today that we have in order to prove bodies are dead.

"The book (The Zombie Survival Guide) is divided into six separate chapters, a list of fictional attacks throughout history and an appendix. The first chapter 'The Undead: Myths and Realities' outlines Solanum, the fictional virus that creates a zombie"

The earth has been around for thousands upon thousands of years. For the amount of years humans have been occupying earth, there have been no zombie attacks. If it were possbiel, it would've happened already. Nowadays, dead bodies are handled much more carefully than they were in times such as ancient Egypt, or in 1892 like your last example. If there were viruses that could reanimate a corpse, it would've happened then because now bodies are handled much more scientifically and in cleaner enviornments.